Archived posting to the Leica Users Group, 2000/11/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Depends on manufacturer and model. In most cases none, but Singh Ray's KN Ultra Violet filter for Ex. requires a increase of 1/3 of an f-stop. Contact the manufacturer for more information. Regards, Robert